Question: Which battery storage power station has the max energy storage capacity?
Paraphrase: What battery power station has the highest amount of energy storage capacity?
SPARQL (Wikidata): select ?ent where { ?ent wdt:P31 wd:Q810924 . ?ent wdt:P4140 ?obj } ORDER BY DESC(?obj)LIMIT 5 
Answer: Alamitos Energy Storage Array, Buzen Substation  Battery Storage System, Hornsdale Power Reserve, Lake Bonney Battery Energy Storage System, Gannawarra Energy Storage System